Add armv7s to the iOS ARCH list

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index d5d5a5960c02e9602d9f23ee3c5ab6f2aa6fe43c..531339fa4762a600cd4c73827aa09cdd86a64546 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -5046,13 +5046,13 @@
             # This need to include the "arm" architectures but also the "x86"
             # ones (they are used when building for the simulator).
             ['target_subarch=="arm32"', {
-              'VALID_ARCHS': ['armv7', 'i386'],
+              'VALID_ARCHS': ['armv7', 'armv7s', 'i386'],
             }],
             ['target_subarch=="arm64"', {
               'VALID_ARCHS': ['arm64', 'x86_64'],
             }],
             ['target_subarch=="both"', {
-              'VALID_ARCHS': ['arm64', 'armv7', 'x86_64', 'i386'],
+              'VALID_ARCHS': ['arm64', 'armv7', 'armv7s', 'x86_64', 'i386'],
             }],
             ['use_system_libcxx==1', {
               'target_conditions': [