build(bl1): sort sections by alignment by default

This change forces LD to sort all input sections by alignment when
allocating them within an output section. This is done in some places
explicitly in the linker scripts today, but this makes sure we don't
miss any easy targets.

Change-Id: I69d6acea822036a6365a7ea10fa732b5e0387f52
Signed-off-by: Chris Kay <chris.kay@arm.com>

bl1/bl1.mk

@@ -29,4 +29,10 @@ ifeq (${TRUSTED_BOARD_BOOT},1)
 BL1_SOURCES		+=	bl1/bl1_fwu.c
 endif
 
+ifneq ($(findstring gcc,$(notdir $(LD))),)
+        BL1_LDFLAGS	+=	-Wl,--sort-section=alignment
+else ifneq ($(findstring ld,$(notdir $(LD))),)
+        BL1_LDFLAGS	+=	--sort-section=alignment
+endif
+
 BL1_DEFAULT_LINKER_SCRIPT_SOURCE := bl1/bl1.ld.S