MIPS: Fix mksnapshot on big-endian.

Paritally revert standalone.gypi changes in a451bd1a and introduce a new separate variable for the mkpeephole.

On big-endian MIPS, qemu is used to build the snapshot,
because there's no simulator support for big-endian MIPS.

BUG=

Committed: https://crrev.com/928d2395c3fdf836cf9961cde96e6b274a6b1e20
Review-Url: https://codereview.chromium.org/2172653002
Cr-Original-Commit-Position: refs/heads/master@{#38103}
Cr-Commit-Position: refs/heads/master@{#38165}

gypfiles/standalone.gypi

@@ -238,13 +238,24 @@
         (v8_target_arch=="arm64" and host_arch!="arm64") or \
         (v8_target_arch=="mipsel" and host_arch!="mipsel") or \
         (v8_target_arch=="mips64el" and host_arch!="mips64el") or \
-        (v8_target_arch=="mips" and host_arch!="mips") or \
         (v8_target_arch=="x64" and host_arch!="x64") or \
         (OS=="android" or OS=="qnx")', {
         'want_separate_host_toolset': 1,
       }, {
         'want_separate_host_toolset': 0,
       }],
+      ['(v8_target_arch=="arm" and host_arch!="arm") or \
+        (v8_target_arch=="arm64" and host_arch!="arm64") or \
+        (v8_target_arch=="mipsel" and host_arch!="mipsel") or \
+        (v8_target_arch=="mips64el" and host_arch!="mips64el") or \
+        (v8_target_arch=="mips" and host_arch!="mips") or \
+        (v8_target_arch=="mips64" and host_arch!="mips64") or \
+        (v8_target_arch=="x64" and host_arch!="x64") or \
+        (OS=="android" or OS=="qnx")', {
+        'want_separate_host_toolset_mkpeephole': 1,
+      }, {
+        'want_separate_host_toolset_mkpeephole': 0,
+      }],
       ['OS == "win"', {
         'os_posix%': 0,
       }, {

gypfiles/toolchain.gypi

@@ -71,6 +71,7 @@
     # Chrome needs this definition unconditionally. For standalone V8 builds,
     # it's handled in gypfiles/standalone.gypi.
     'want_separate_host_toolset%': 1,
+    'want_separate_host_toolset_mkpeephole%': 1,
 
     # Toolset the shell binary should be compiled for. Possible values are
     # 'host' and 'target'.

src/v8.gyp

@@ -399,7 +399,7 @@
         'action': ['<(mkpeephole_exec)', '<(INTERMEDIATE_DIR)/bytecode-peephole-table.cc' ],
         'process_outputs_as_sources': 1,
         'conditions': [
-          ['want_separate_host_toolset==1', {
+          ['want_separate_host_toolset_mkpeephole==1', {
             'dependencies': ['mkpeephole#host'],
             'toolsets': ['host'],
           }, {
@@ -1794,7 +1794,8 @@
         'base/utils/random-number-generator.h',
       ],
       'conditions': [
-        ['want_separate_host_toolset==1', {
+        ['want_separate_host_toolset==1 or \
+          want_separate_host_toolset_mkpeephole==1', {
           'toolsets': ['host', 'target'],
         }, {
           'toolsets': ['target'],
@@ -2380,7 +2381,7 @@
         'interpreter/mkpeephole.cc'
       ],
       'conditions': [
-        ['want_separate_host_toolset==1', {
+        ['want_separate_host_toolset_mkpeephole==1', {
           'toolsets': ['host'],
         }, {
           'toolsets': ['target'],