[msan] Allow nested symbolizer and loader scopes.
[msan] Allow nested symbolizer and loader scopes.


git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@191196 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt