yasm: add support for targeting iOS (at least simulator) by copying mac->ios

third_party/yasm/yasm_compile.gypi

Index: third_party/yasm/yasm_compile.gypi
diff --git a/third_party/yasm/yasm_compile.gypi b/third_party/yasm/yasm_compile.gypi
index 58a0dfbc142337f471acf60598234371fe1c5fd0..ce72172e36dd73c40313373dac8773516ab57355 100644
--- a/third_party/yasm/yasm_compile.gypi
+++ b/third_party/yasm/yasm_compile.gypi
@@ -40,26 +40,26 @@
       }],
 
       # Define yasm_flags that pass into YASM.
-      [ 'os_posix==1 and OS!="mac" and target_arch=="ia32"', {
+      [ 'os_posix==1 and OS!="mac" and OS!="ios" and target_arch=="ia32"', {
         'yasm_flags': [
           '-felf32',
           '-m', 'x86',
         ],
       }],
-      [ 'os_posix==1 and OS!="mac" and target_arch=="x64"', {
+      [ 'os_posix==1 and OS!="mac" and OS!="ios" and target_arch=="x64"', {
         'yasm_flags': [
           '-DPIC',
           '-felf64',
           '-m', 'amd64',
         ],
       }],
-      [ 'OS=="mac" and target_arch=="ia32"', {
+      [ '(OS=="mac" or OS=="ios") and target_arch=="ia32"', {
         'yasm_flags': [
           '-fmacho32',
           '-m', 'x86',
         ],
       }],
-      [ 'OS=="mac" and target_arch=="x64"', {
+      [ '(OS=="mac" or OS=="ios") and target_arch=="x64"', {
         'yasm_flags': [
           '-fmacho64',
           '-m', 'amd64',