Bugzilla Bug 156605: disable executable stacks in the Mozilla clients on

Solaris.  The patch is contributed by Alfred Peng <alfred.peng@sun.com>.
r=wtc. sr=bsmedberg.

configure.in

@@ -2027,6 +2027,14 @@ dnl the qsort routine under solaris is faulty
        CFLAGS="$CFLAGS -xstrconst -xbuiltin=%all"
        CXXFLAGS="$CXXFLAGS -xbuiltin=%all -features=tmplife -norunpath"
        LDFLAGS="-xildoff -z lazyload -z combreloc $LDFLAGS"
+       if test -z "$CROSS_COMPILE" && test -f /usr/lib/ld/map.noexstk; then
+           _SAVE_LDFLAGS=$LDFLAGS
+           LDFLAGS="-M /usr/lib/ld/map.noexstk $LDFLAGS" 
+           AC_TRY_LINK([#include <stdio.h>],
+                       [printf("Hello World\n");],
+                       ,
+                       [LDFLAGS=$_SAVE_LDFLAGS])
+       fi
        MOZ_OPTIMIZE_FLAGS="-xO4"
        MKSHLIB='$(CXX) $(CXXFLAGS) $(DSO_PIC_FLAGS) $(DSO_LDOPTS) -h $@ -o $@'
        MKCSHLIB='$(CC) $(CFLAGS) $(DSO_PIC_FLAGS) -G -z muldefs -h $@ -o $@'