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/qemu/qemu_sbsa/include/platform_def.h b/plat/qemu/qemu_sbsa/include/platform_def.h
index d971ebe..85fbb4d 100644
--- a/plat/qemu/qemu_sbsa/include/platform_def.h
+++ b/plat/qemu/qemu_sbsa/include/platform_def.h
@@ -364,8 +364,8 @@
  * Name of the section to put the translation tables used by the S-EL1/S-EL0
  * context of a Secure Partition.
  */
-#define PLAT_SP_IMAGE_XLAT_SECTION_NAME		"qemu_sp_xlat_table"
-#define PLAT_SP_IMAGE_BASE_XLAT_SECTION_NAME	"qemu_sp_xlat_table"
+#define PLAT_SP_IMAGE_XLAT_SECTION_NAME		".qemu_sp_xlat_table"
+#define PLAT_SP_IMAGE_BASE_XLAT_SECTION_NAME	".qemu_sp_xlat_table"
 
 /* Cookies passed to the Secure Partition at boot. Not used by QEMU platforms.*/
 #define PLAT_SPM_COOKIE_0		ULL(0)