Don't enable safemalloc for valgrind builds, it's too slow.

BUILD/SETUP.sh

@@ -122,7 +122,7 @@ fi
 # Override -DFORCE_INIT_OF_VARS from debug_cflags. It enables the macro
 # LINT_INIT(), which is only useful for silencing spurious warnings
 # of static analysis tools. We want LINT_INIT() to be a no-op in Valgrind.
-valgrind_flags="-UFORCE_INIT_OF_VARS -DHAVE_purify "
+valgrind_flags="-USAFEMALLOC -UFORCE_INIT_OF_VARS -DHAVE_purify "
 valgrind_flags="$valgrind_flags -DMYSQL_SERVER_SUFFIX=-valgrind-max"
 valgrind_configs="--with-valgrind"
 #

BUILD/build_mccge.sh

@@ -938,7 +938,7 @@ set_up_ccache()
 set_valgrind_flags()
 {
   if test "x$valgrind_flag" = "xyes" ; then
-    loc_valgrind_flags="-UFORCE_INIT_OF_VARS -DHAVE_purify "
+    loc_valgrind_flags="-USAFEMALLOC -UFORCE_INIT_OF_VARS -DHAVE_purify "
     loc_valgrind_flags="$loc_valgrind_flags -DMYSQL_SERVER_SUFFIX=-valgrind-max"
     compiler_flags="$compiler_flags $loc_valgrind_flags"
     with_flags="$with_flags --with-valgrind"