Import L Build Tools from git_lmp-mr1-release build 1585856

http://android-build/builds/git_lmp-mr1-release-linux-sdk_phone_x86-sdk/1585856/sdk-repo-linux-build-tools-1585856.zip

source.properties has been modified to make this appear as API 22
diff --git a/aapt b/aapt
index 0be9101..2bddb2c 100755
--- a/aapt
+++ b/aapt
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diff --git a/lib/dx.jar b/lib/dx.jar
index c46d57c..d4f2dde 100644
--- a/lib/dx.jar
+++ b/lib/dx.jar
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diff --git a/llvm-rs-cc b/llvm-rs-cc
index 7fa7cdb..cc92ec5 100755
--- a/llvm-rs-cc
+++ b/llvm-rs-cc
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