build: always prefix section names with `.`

Some of our specialized sections are not prefixed with the conventional
period. The compiler uses input section names to derive certain other
section names (e.g. `.rela.text`, `.relacpu_ops`), and these can be
difficult to select in linker scripts when there is a lack of a
delimiter.

This change introduces the period prefix to all specialized section
names.

BREAKING-CHANGE: All input and output linker section names have been
 prefixed with the period character, e.g. `cpu_ops` -> `.cpu_ops`.

Change-Id: I51c13c5266d5975fbd944ef4961328e72f82fc1c
Signed-off-by: Chris Kay <chris.kay@arm.com>
diff --git a/plat/common/aarch32/platform_mp_stack.S b/plat/common/aarch32/platform_mp_stack.S
index 6c3d08d..314e87a 100644
--- a/plat/common/aarch32/platform_mp_stack.S
+++ b/plat/common/aarch32/platform_mp_stack.S
@@ -43,5 +43,5 @@
 	 * stack of PLATFORM_STACK_SIZE bytes.
 	 * -----------------------------------------------------
 	 */
-declare_stack platform_normal_stacks, tzfw_normal_stacks, \
+declare_stack platform_normal_stacks, .tzfw_normal_stacks, \
 		PLATFORM_STACK_SIZE, PLATFORM_CORE_COUNT