New driverlib: Stellaris->TivaC
Fix pre-processor check for GCC
Fix Hardware UART sends garbare on reset
Fix UART initial characters are garbage for G2 and F5529 #293
Revert "Fix UART initial characters are garbage for G2 and F5529 #293"

This reverts commit b6e58c82caf13b765e9caade9578c83fcec34db9.
Merge branch 'master' into tivaware
Merge pull request #292 from energia/tivaware

Update driverlib to the latest TivaC driverlib