Bug#29645: Link failure when using the embedded server

mysql_config --cflags gave a flag that forced the HP/UX
C++ compiler into C-mode; as a result, C++ sources could
not be compiled correctly.

We now filter out the offending flag (like we do for Sun)
so that --cflags will work for both C and C++.

scripts/mysql_config.sh

@@ -113,10 +113,12 @@ include="-I$pkgincludedir"
 # Remove some options that a client doesn't have to care about
 # FIXME until we have a --cxxflags, we need to remove -Xa
 #       and -xstrconst to make --cflags usable for Sun Forte C++
+# FIXME until we have a --cxxflags, we need to remove -AC99
+#       to make --cflags usable for HP C++ (aCC)
 for remove in DDBUG_OFF DSAFEMALLOC USAFEMALLOC DSAFE_MUTEX \
               DPEDANTIC_SAFEMALLOC DUNIV_MUST_NOT_INLINE DFORCE_INIT_OF_VARS \
               DEXTRA_DEBUG DHAVE_purify O 'O[0-9]' 'xO[0-9]' 'W[-A-Za-z]*' \
-              Xa xstrconst "xc99=none" \
+              Xa xstrconst "xc99=none" AC99 \
               unroll2 ip mp restrict
 do
   # The first option we might strip will always have a space before it because