build: Use same flags for CXXFLAGS as CFLAGS

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
build: Quiesce float comparison warnings

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
eglFramebuffer: Fix potential use of uninitialzied variables

Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>