Revert "BoardConfig : Enable LOWMEM optimization with bionic"

This reverts commit 4690a4703e051b59e6280b391b281e378b03c802.
Revert "Enable Bionic Optimization"

This reverts commit cd2db69091a9f02bf3883a76033b0246166fe2ff.
Specific Toolchain to build
BoardConfig : Enable LOWMEM optimization with bionic