Fix pnacl_support_extension null build on linux/mac (no longer have libgcc_eh.a).

The libgcc_eh.a file is no longer in the translator tarball
possibly after NaCl revision:

1fceb45: (dschuff) Wrap PNaCl sandboxed translator build in toolchain_build recipe

Cr-Commit-Position: refs/heads/master@{#312891}, fixed
this for windows builds, but not linux / mac.

Review URL: https://codereview.chromium.org/879803002

Cr-Commit-Position: refs/heads/master@{#313192}

ppapi/native_client/src/untrusted/pnacl_support_extension/pnacl_support_extension.gyp

@@ -124,7 +124,6 @@
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_arm_ld_nexe',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_arm_libcrt_platform_a',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_arm_libgcc_a',
-                          '<(PRODUCT_DIR)/pnacl/pnacl_public_arm_libgcc_eh_a',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_arm_libpnacl_irt_shim_a',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_arm_pnacl_llc_nexe',
                         ],
@@ -145,7 +144,6 @@
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_mips32_ld_nexe',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_mips32_libcrt_platform_a',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_mips32_libgcc_a',
-                          '<(PRODUCT_DIR)/pnacl/pnacl_public_mips32_libgcc_eh_a',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_mips32_libpnacl_irt_shim_a',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_mips32_llc_nexe',
                         ],
@@ -166,7 +164,6 @@
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_x86_32_ld_nexe',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_x86_32_libcrt_platform_a',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_x86_32_libgcc_a',
-                          '<(PRODUCT_DIR)/pnacl/pnacl_public_x86_32_libgcc_eh_a',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_x86_32_libpnacl_irt_shim_a',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_x86_32_pnacl_llc_nexe',
                         ],
@@ -187,7 +184,6 @@
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_x86_64_ld_nexe',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_x86_64_libcrt_platform_a',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_x86_64_libgcc_a',
-                          '<(PRODUCT_DIR)/pnacl/pnacl_public_x86_64_libgcc_eh_a',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_x86_64_libpnacl_irt_shim_a',
                           '<(PRODUCT_DIR)/pnacl/pnacl_public_x86_64_pnacl_llc_nexe',
                         ],