Revert of Instrumented libraries: update the libnspr4 build script.

Revert of Instrumented libraries: update the libnspr4 build script. (patchset #1 id:1 of https://codereview.chromium.org/600793002/)

Reason for revert:
MSAN bots failed.

FAILED: cd ../../third_party/instrumented_libraries; ../../third_party/instrumented_libraries/download_build_install.py "--product-directory=../../out/Release" "--package=libnspr4" "--intermediate-directory=../../out/Release/obj/third_party/instrumented_libraries/msan-libnspr4.gen" "--sanitizer-type=msan" "--extra-configure-flags=--enable-64bit --disable-debug" "--cflags=-O2 -gline-tables-only -fPIC -w -U_FORITFY_SOURCE \"-fsanitize=memory\" \"-fsanitize-memory-track-origins=0\"" "--ldflags=-Wl,-z,origin -Wl,-R,XORIGIN/. \"-fsanitize=memory\"" "--cc=/mnt/data/b/build/goma/gomacc /mnt/data/b/build/slave/Chromium_Linux_MSan_Builder/build/src/third_party/llvm-build/Release+Asserts/bin/clang" "--cxx=/mnt/data/b/build/goma/gomacc /mnt/data/b/build/slave/Chromium_Linux_MSan_Builder/build/src/third_party/llvm-build/Release+Asserts/bin/clang++" "--jobs=10" "--build-method=destdir" "--run-before-build=scripts/libnspr4.sh"
mv: cannot stat `nspr/*': No such file or directory

Original issue's description:
> Instrumented libraries: update the libnspr4 build script.
>
> There has been a security update in Precise which changed the paths somewhat.
>
> BUG=313751
> TBR=glider@chromium.org
> NOTRY=true
>
> Committed: https://crrev.com/91e9dd404b29bcbb847b98530e83f3c40720b890
> Cr-Commit-Position: refs/heads/master@{#296395}

TBR=glider@chromium.org,earthdok@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=313751
Committed: https://crrev.com/5830d6a382f4f7b6bf64629c00d5ed4a2a9c0f4b
Cr-Commit-Position: refs/heads/master@{#296454}

[Lei Zhang, 2014-09-24 17:47:42]

Created Revert of Instrumented libraries: update the libnspr4 build script.

[commit-bot: I haz the power, 2014-09-24 17:48:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/598983004/1

[commit-bot: I haz the power, 2014-09-24 17:49:13]

Committed patchset #1 (id:1) as d6e5a6c6e56ce0ea2b09e0a7452bad83c093299e

[commit-bot: I haz the power, 2014-09-24 17:49:50]

Patchset 1 (id:??) landed as
https://crrev.com/5830d6a382f4f7b6bf64629c00d5ed4a2a9c0f4b
Cr-Commit-Position: refs/heads/master@{#296454}