HarfBuzz: Remove trailing comma from the enum in hb-paint.h

The following error takes place during JDK build with HarfBuzz version 7.0.1 on Solaris platform:

libharfbuzz/hb-paint.h, line 620: error: trailing "," prohibited in enum declaration (E_TRAILING_COMMA_IN_ENUM)
CC: Warning: Option -fsingle passed to ld, if ld is invoked, ignored otherwise
libharfbuzz/hb-paint.h, line 620: Error: Identifier expected instead of "}".
 1 Error(s) detected.

The root cause of the error is that hb-paint.h has the enum with trailing comma which was removed in upstream (HarfBuzz source repo):

https://github.com/harfbuzz/harfbuzz/discussions/4188
https://github.com/harfbuzz/harfbuzz/commit/04a47932a3844f7e73e3af8b05fb98c8b54fb779