add Android support [1/1]

[Problem]
need the ability to collect binary trace data on target
for off-line analysis

[Solution]
add minimal subset to Android build (external/trace-cmd)
- no GUI
- no Python support for target
- no plugins
- fixed warnings
- added glob.c/glob.h (missing in Android)
- fixed glob dependency on muli-chararter support (broken in Android)
- fixed trace-cmd dependency on dynamic scanf format (not supported in Android)

[Test]

[Feature]
ftrace

Signed-off-by: Alexey Polyudov <alexeyp@lab126.com>