[8u] RFR: 8252395: [8u] --with-native-debug-symbols=external doesn't include debuginfo files for binaries

[Severin Gehwolf]

Hi,

Could I get a reivew of this 8u specific bug please? When configured
--with-native-debug-symbols=external,zipped the resulting external
debuginfo files for binaries (in images/bin folder) aren't there.

In OpenJDK 8u there is some special casing involved for bin/java and
bin/unpack200. Thus, I had to special case them for the debuginfo
variant files too otherwise those files would be missing in the images
folders (j2sdk-image, j2re-image).

Bug: https://bugs.openjdk.java.net/browse/JDK-8252395
webrev: https://cr.openjdk.java.net/~sgehwolf/webrevs/JDK-8252395/01/webrev/

Testing: Build in configs --with-native-debugsymbols={zipped,external,internal,none}
         on Linux x86 and manually debugging some launcher code. Works now
         with symbols. Symbols were missing before this patch.

Thanks,
Severin