Log Message:
textproc/openjade: Work around buggy openjade code harder!

openjade has some buggy code, which relies on storage remaining valid
when the C++ standard says that it is undefined:
  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69534#c9

Recent gcc removes code that writes to this about-to-be-undefined
storage, shrinking the openjade binary.  Some versions further result
in a binary which crashes.

pkgsrc had a workaround to add -fno-tree-dse when PKGSRC_COMPILER was
equal to gcc.  That is buggy, because "ccache gcc", "distcc gcc",
etc. should also get the workaround.  This commit replaces the exact
test with a pattern match.

Now, the workaround gcc flag is passed when compiling with ccache.

Fixes pkg/54134.  Note that the comments in the PR which implicate
ccache as buggy turned out to be untrue.