RFR: JDK-8039030: 9-dev windows-i586 build failed with mktemp: command not found

[Erik Joelsson]

Please review this re-fix of the F# on the path problem on windows. This 
was fixed before in JDK-8009315, but was unfortunately reverted by 
JDK-8035751. This patch readds the filtering of path entries containing 
'#' from the path.

Original bug: https://bugs.openjdk.java.net/browse/JDK-8009315
New bug: https://bugs.openjdk.java.net/browse/JDK-8039030
Patch inline:

diff -r 54dd5b81ed46 common/autoconf/toolchain_windows.m4
--- a/common/autoconf/toolchain_windows.m4      Tue Apr 01 17:25:15 2014 
-0700
+++ b/common/autoconf/toolchain_windows.m4      Fri Apr 04 12:17:30 2014 
+0200
@@ -211,6 +211,9 @@
        VCINSTALLDIR=`$ECHO "$VCINSTALLDIR" | $SED 's/\\\\* *$//'`
        WindowsSDKDir=`$ECHO "$WindowsSDKDir" | $SED 's/\\\\* *$//'`
        WINDOWSSDKDIR=`$ECHO "$WINDOWSSDKDIR" | $SED 's/\\\\* *$//'`
+      # Remove any paths containing # (typically F#) as that messes up 
make. This
+      # is needed if visual studio was installed with F# support.
+      VS_PATH=`$ECHO "$VS_PATH" | $SED 's/[[^:#]]*#[^:]*://g'`

        AC_SUBST(VS_PATH)
        AC_SUBST(VS_INCLUDE)