libc/musl: Add options for optimization

This commit adds configuration knobs for optimizing musl-libc.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
libc/musl: Add config option for debugging info

This option enables a configuration knob for adding debugging info.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
libc/musl: Add config option for extra developer warnings

This commit adds a configuration knob for enabling extra developer
warnings to be enabled during the musl-libc build.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
config/gcc: Disable CC_GCC_LIBSANITIZER for musl-libc

Disable libsanitizer for musl-libc.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
populate: fix empty files.list

The output format of the file(1) command have changed since (at least)
the version 5.14. We need to to take care of an extra space.

Signed-off-by: Jean-Marie Lemetayer <jeanmarie.lemetayer@gmail.com>
[yann.morin.1998@free.fr: do not right-shift trailing back-slashes]
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Merge remote-tracking branch 'origin/master'