Add target armv7s-darwin-gcc.

Really just armv7. This is a convenience target intended to make iOS
development with libvpx easier. Xcode projects with default settings
will fail to build when a framework lacks armv7s support when targetting
iOS7.

Change-Id: I7eb80d52eec25501febc0d2c3c0b4ed964b8ed5b

README

@@ -62,6 +62,7 @@ COMPILING THE APPLICATIONS/LIBRARIES:
     armv7-none-rvct
     armv7-win32-vs11
     armv7-win32-vs12
+    armv7s-darwin-gcc
     mips32-linux-gcc
     ppc32-darwin8-gcc
     ppc32-darwin9-gcc
@@ -79,6 +80,7 @@ COMPILING THE APPLICATIONS/LIBRARIES:
     x86-darwin11-gcc
     x86-darwin12-gcc
     x86-darwin13-gcc
+    x86-iphonesimulator-gcc
     x86-linux-gcc
     x86-linux-icc
     x86-os2-gcc
@@ -95,6 +97,7 @@ COMPILING THE APPLICATIONS/LIBRARIES:
     x86_64-darwin11-gcc
     x86_64-darwin12-gcc
     x86_64-darwin13-gcc
+    x86_64-iphonesimulator-gcc
     x86_64-linux-gcc
     x86_64-linux-icc
     x86_64-solaris-gcc

build/make/configure.sh

@@ -802,7 +802,7 @@ process_common_toolchain() {
         armv8)
             soft_enable neon
             ;;
-        armv7)
+        armv7|armv7s)
             soft_enable neon
             soft_enable neon_asm
             soft_enable media
@@ -831,7 +831,7 @@ process_common_toolchain() {
             arch_int=${arch_int%%te}
             check_add_asflags --defsym ARCHITECTURE=${arch_int}
             tune_cflags="-mtune="
-            if [ ${tgt_isa} = "armv7" ]; then
+            if [ ${tgt_isa} = "armv7" ] || [ ${tgt_isa} = "armv7s" ]; then
                 if [ -z "${float_abi}" ]; then
                     check_cpp <<EOF && float_abi=hard || float_abi=softfp
 #ifndef __ARM_PCS_VFP

configure

@@ -103,6 +103,7 @@ all_platforms="${all_platforms} armv7-linux-gcc"     #neon Cortex-A8
 all_platforms="${all_platforms} armv7-none-rvct"     #neon Cortex-A8
 all_platforms="${all_platforms} armv7-win32-vs11"
 all_platforms="${all_platforms} armv7-win32-vs12"
+all_platforms="${all_platforms} armv7s-darwin-gcc"
 all_platforms="${all_platforms} mips32-linux-gcc"
 all_platforms="${all_platforms} ppc32-darwin8-gcc"
 all_platforms="${all_platforms} ppc32-darwin9-gcc"