Revert "sw34bf03: #i81127#: patch by pmladek: linux/ppc: remove -fsigned-char"

This reverts commit 875c9a28.
because it doesn't make sense to build the dmake modules
without -fsigned-char and the gbuild modules with -fsigned-char

and we're still got a few bugs where we assume chars are signed

Conflicts:

	solenv/inc/unxlngppc.mk

Change-Id: I6ac07fa3ebadd83efd0da1ee69a010b62dfaad59

solenv/inc/unxlngppc.mk

@@ -31,3 +31,6 @@ CDEFAULTOPT=-Os
 PICSWITCH:=-fPIC
 .INCLUDE : unxlng.mk
 CDEFS+=-DPOWERPC -DPPC
+CFLAGS+=-fsigned-char
+CFLAGSCC+=-fsigned-char
+CFLAGSCXX+=-fsigned-char