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The tab between -Wdisabled-optimization and -Wvla is replaced with
a space. This avoids having it removed when copy/pasting the compilation
command line, and having the following error:
arm-none-eabi-gcc: error: unrecognized command line option
 '-Wdisabled-optimization-Wvla'; did you mean '-Wdisabled-optimization'?
Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
Change-Id: I72de2a70d192a7813b1f9b55485914142d1fc428