Revert of mac: In static library builds, link against a static libc++.a

Revert of mac: In static library builds, link against a static libc++.a (patchset #3 id:40001 of https://codereview.chromium.org/1413863003/ )

Reason for revert:
Broke Mac ASan x64: http://build.chromium.org/p/chromium.memory/builders/Mac%20ASan%2064%20Builder/builds/27061

FAILED: /b/build/goma/gomacc ../../third_party/llvm-build/Release+Asserts/bin/clang -Wl,-search_paths_first -fsanitize=address -Wl,-pie -Wl,-u,__sanitizer_options_link_helper -Wl,-dead_strip -mmacosx-version-min=10.6 -isysroot /Applications/Xcode5.1.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.6.sdk -arch x86_64 -L. -stdlib=libc++ -o tls_edit obj/native_client/src/tools/tls_edit/tls_edit.tls_edit.o libsanitizer_options.a libplatform.a librdfa_validator.a libgio.a  '-L../../third_party/libc++-static' && (export BUILT_FRAMEWORKS_DIR=/b/build/slave/Mac_ASan_64_Builder/build/src/out/Release; export BUILT_PRODUCTS_DIR=/b/build/slave/Mac_ASan_64_Builder/build/src/out/Release; export CONFIGURATION=Release; export EXECUTABLE_NAME=tls_edit; export EXECUTABLE_PATH=tls_edit; export FULL_PRODUCT_NAME=tls_edit; export PRODUCT_NAME=tls_edit; export PRODUCT_TYPE=com.apple.product-type.tool; export SDKROOT=/Applications/Xcode5.1.1.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.6.sdk; export SRCROOT=/b/build/slave/Mac_ASan_64_Builder/build/src/out/Release/../../native_client/src/tools/tls_edit; export SOURCE_ROOT="${SRCROOT}"; export TARGET_BUILD_DIR=/b/build/slave/Mac_ASan_64_Builder/build/src/out/Release; export TEMP_DIR="${TMPDIR}"; (cd ../../native_client/src/tools/tls_edit && ../../../../build/mac/change_mach_o_flags_from_xcode.sh && ../../../../build/mac/strip_from_xcode); G=$?; ((exit $G) || rm -rf tls_edit) && exit $G)
ld: library not found for -lc++abi

Original issue's description:
> mac: In static library builds, link against a static libc++.a
>
> To achieve this, just add a -Lthird_party/libc++-static flag to the link line,
> and add a postbuild that checks that Chromium Framework depends on neither
> libstdc++.dylib nor libc++.dylib Use the existing verify_order postbuild
> for this, and let it not run in component builds (since what it checks for
> isn't interesting in that config, and we do depend on system libc++ in
> component builds).
>
> This change is small but subtle, see thread
> "[chromium-dev] Intent to implement: Statically linking libc++ for Chrome/Mac"
> and the document linked from comment 14 on the bug for details.
>
> Ideally, this has no observable behavior change. If it looks like this
> breaks tests somewhere, especially on 10.6, please revert. (The bots
> like it, and the things I tried on 10.6 worked too, though.)
>
> BUG=400091
> R=mark@chromium.org
>
> Committed: https://chromium.googlesource.com/chromium/src/+/494270d01189f8b4b2b4ebd501fd980833489729

TBR=mark@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=400091
Committed: https://crrev.com/9fe937fb45fd57da5988abde1e0afc9a7c8bb5d5
Cr-Commit-Position: refs/heads/master@{#355837}

[Nico, 2015-10-23 18:24:30]

Created Revert of mac: In static library builds, link against a static libc++.a

[commit-bot: I haz the power, 2015-10-23 18:25:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1424573002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1424573002/1

[commit-bot: I haz the power, 2015-10-23 18:27:13]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-23 18:28:20]

Patchset 1 (id:??) landed as
https://crrev.com/9fe937fb45fd57da5988abde1e0afc9a7c8bb5d5
Cr-Commit-Position: refs/heads/master@{#355837}

[Mark Mentovai, 2015-10-23 21:02:24]

LGTM