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/lib/xlat_tables/aarch32/nonlpae_tables.c b/lib/xlat_tables/aarch32/nonlpae_tables.c
index 7cd509d..1e207a4 100644
--- a/lib/xlat_tables/aarch32/nonlpae_tables.c
+++ b/lib/xlat_tables/aarch32/nonlpae_tables.c
@@ -138,10 +138,10 @@
 static uintptr_t xlat_max_va;
 
 static uint32_t mmu_l1_base[NUM_1MB_IN_4GB]
-	__aligned(MMU32B_L1_TABLE_ALIGN) __attribute__((section("xlat_table")));
+	__aligned(MMU32B_L1_TABLE_ALIGN) __attribute__((section(".xlat_table")));
 
 static uint32_t mmu_l2_base[MAX_XLAT_TABLES][NUM_4K_IN_1MB]
-	__aligned(MMU32B_L2_TABLE_ALIGN) __attribute__((section("xlat_table")));
+	__aligned(MMU32B_L2_TABLE_ALIGN) __attribute__((section(".xlat_table")));
 
 /*
  * Array of all memory regions stored in order of ascending base address.