RFR: JDK-8309224: Fix xlc17 clang 15 warnings in java.desktop

[JoKern65]

This pr is a split off from JDK-8308288: Fix xlc17 clang warnings in shared code https://github.com/openjdk/jdk/pull/14146
It handles the part in java.desktop.
prrace had already reviewed this part in the original pr.

Here are the handled errors for which we use the same warning disabling as gcc.

src/java.desktop/unix/native/common/awt/awt_GraphicsEnv.h:53:12: error: a function declaration without a prototype is deprecated in all versions of C and is treated as a zero-parameter prototype in C2x, conflicting with a previous declaration [-Werror,-Wdeprecated-non-prototype]
extern int XShmQueryExtension();
^
/usr/include/X11/extensions/XShm.h:91:6: note: conflicting prototype is here
Bool XShmQueryExtension(
^
solved by adding line (generic, because several source files are involved)
DISABLED_WARNINGS_clang_aix := deprecated-non-prototype, \

src/java.desktop/unix/native/libawt_xawt/xawt/awt_Taskbar.c:158:11: error: using the result of an assignment as a condition without parentheses [-Werror,-Wparentheses]
if (m = fp_unity_launcher_entry_get_quicklist(entry)) {
~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
solved by adding line
DISABLED_WARNINGS_clang_aix_awt_Taskbar.c := parentheses, \

src/java.desktop/share/native/common/java2d/opengl/OGLPaints.c:581:48: error: format string is not a string literal [-Werror,-Wformat-nonliteral]
snprintf(cycleCode, sizeof(cycleCode), noCycleCode, texCoordCalcCode);
^~~~~~~~~~~
solved by adding line
DISABLED_WARNINGS_clang_aix_OGLPaints.c := format-nonliteral, \

src/java.desktop/share/native/common/java2d/opengl/OGLBufImgOps.c:153:48: error: format string is not a string literal [-Werror,-Wformat-nonliteral]
snprintf(finalSource, sizeof(finalSource), convolveShaderSource,
^~~~~~~~~~~~~~~~~~~~
solved by adding line
DISABLED_WARNINGS_clang_aix_OGLBufImgOps.c := format-nonliteral, \

src/java.desktop/unix/native/libawt_xawt/awt/gtk2_interface.c:1095:41: error: '&&' within '||' [-Werror,-Wlogical-op-parentheses]
if ((synth_state & MOUSE_OVER) != 0 && (synth_state & PRESSED) == 0 ||

src/java.desktop/unix/native/libawt_xawt/awt/gtk2_interface.c:1180:29: error: using the result of an assignment as a condition without parentheses [-Werror,-Wparentheses]
if (init_result = (NULL == gtk2_widgets[_GTK_CHECK_MENU_ITEM_TYPE]))
~~~~~~~~~~~~^
solved by adding line
DISABLED_WARNINGS_clang_aix_gtk2_interface.c := parentheses logical-op-parentheses, \

src/java.desktop/unix/native/libawt_xawt/awt/gtk3_interface.c:903:29: error: using the result of an assignment as a condition without parentheses [-Werror,-Wparentheses]
if (init_result = (NULL == gtk3_widgets[_GTK_BUTTON_TYPE]))
~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
solved by adding line
DISABLED_WARNINGS_clang_aix_gtk3_interface.c := parentheses, \

src/java.desktop/unix/native/libawt_xawt/awt/sun_awt_X11_GtkFileDialogPeer.c:87:26: error: using the result of an assignment as a condition without parentheses [-Werror,-Wparentheses]
if (pendingException = (*env)->ExceptionOccurred(env)) {
~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
solved by adding line
DISABLED_WARNINGS_clang_aix_sun_awt_X11_GtkFileDialogPeer.c := parentheses, \

src/java.desktop/aix/native/libawt_xawt/awt/awt_InputMethod.c:1969:32: error: comparison of integers of different signs: 'Window' (aka 'unsigned long') and 'jlong' (aka 'long') [-Werror,-Wsign-compare]
if (currentFocusWindow != w) {
~~~~~~~~~~~~~~~~~~ ^ ~
solved by adding line
DISABLED_WARNINGS_clang_aix_awt_InputMethod.c := sign-compare, \

-------------

Commit messages:
 - JDK-8309224

Changes: https://git.openjdk.org/jdk/pull/14263/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14263&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309224
  Stats: 25 lines in 2 files changed: 24 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/14263.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14263/head:pull/14263

PR: https://git.openjdk.org/jdk/pull/14263