Fix Fedora build (undo _FORTIFY_SOURCE for pie)

Recent Fedora releases add -Wp,-D_FORTIFY_SOURCE=2 to rpm builds,
which breaks compiling pie code on some architectures due to its
trying to use (absent) memcpy_chk() instead of usual memcpy().

We must stand strong against FORTIFY_SOURCE in pie code.
No pasaran! Viva la resistance!

NOTE: in tests, FORTIFY_SOURCE is disabled for completely different
reasons (see commit d1a36cc9 for details), so we're not touching it.

[v2: resend the correct (latest) version]
Reported-by: Reported-by: Adrian Reber <adrian@lisas.de>
Signed-off-by: Kir Kolyshkin <kir@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/pie/Makefile

@@ -22,6 +22,7 @@ CFLAGS			+= -iquote $(SRC_DIR)/criu/include
 CFLAGS			+= -iquote $(SRC_DIR)/include
 CFLAGS			+= -iquote $(SRC_DIR)
 CFLAGS			+= -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0
+CFLAGS			+= -Wp,-U_FORTIFY_SOURCE -Wp,-D_FORTIFY_SOURCE=0
 
 
 ifneq ($(filter-out ia32,$(ARCH)),)

criu/pie/Makefile.library

@@ -50,3 +50,4 @@ else
 endif
 
 ccflags-y		+= -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0
+ccflags-y		+= -Wp,-U_FORTIFY_SOURCE -Wp,-D_FORTIFY_SOURCE=0