build: make scripts in gyp run with right python

PR-URL: #39730
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

tools/icu/icu-generic.gyp

@@ -167,7 +167,7 @@
                   'msvs_quote_cmd': 0,
                   'inputs': [ '<(icu_data_in)', 'icu_small.json' ],
                   'outputs': [ '<(SHARED_INTERMEDIATE_DIR)/icutmp/icudt<(icu_ver_major)<(icu_endianness).dat' ],
-                  'action': [ 'python',
+                  'action': [ '<(python)',
                               'icutrim.py',
                               '-P', '<(PRODUCT_DIR)/.', # '.' suffix is a workaround against GYP assumptions :(
                               '-D', '<(icu_data_in)',
@@ -252,7 +252,7 @@
                   'action_name': 'icutrim',
                   'inputs': [ '<(icu_data_in)', 'icu_small.json' ],
                   'outputs': [ '<(SHARED_INTERMEDIATE_DIR)/icutmp/icudt<(icu_ver_major)<(icu_endianness).dat' ],
-                  'action': [ 'python',
+                  'action': [ '<(python)',
                               'icutrim.py',
                               '-P', '<(PRODUCT_DIR)',
                               '-D', '<(icu_data_in)',

tools/v8_gypfiles/v8.gyp

@@ -231,7 +231,7 @@
             '<(generate_bytecode_builtins_list_output)',
           ],
           'action': [
-            'python',
+            '<(python)',
             '<(V8_ROOT)/tools/run.py',
             '<@(_inputs)',
             '<@(_outputs)',
@@ -1554,7 +1554,7 @@
             '<(SHARED_INTERMEDIATE_DIR)/src/regexp/special-case.cc',
           ],
           'action': [
-            'python',
+            '<(python)',
             '<(V8_ROOT)/tools/run.py',
             '<@(_inputs)',
             '<@(_outputs)',