Build tbbmalloc also on mips

[AdrianBunk]

Commit 51c0b2f742920535178560f31c6e91065bf87b41 does not give any information why tbbmalloc is not being built on mips, it would be useful if someone could check the rationale in the original git tree.

There is an (unused/obsolete?) https://github.com/oneapi-src/oneTBB/blob/master/cmake/toolchains/mips.cmake and I wonder whether not building tbbmalloc might have been for this toolchain instead of the processor.

On Debian tbbmalloc builds with gcc for both 32bit and 64bit (little endian) mips. Enabling all currently disabled tests in test/CMakeLists.txt resulted in 133 passes for 64bit and only test_malloc_pools failing on 32bit, mips tests will be a separate pull request.

Signed-off-by: Adrian Bunk [email protected]