Android: fix logcat support building in AOSP.

Android: fix logcat support building in AOSP.

Building failed this way:

log.c:51:51: error: use of undeclared identifier fmt
        __android_log_vprint(ANDROID_LOG_FATAL, PACKAGE, fmt, aq);
                                                         ^
log.c:79:51: error: use of undeclared identifier fmt
        __android_log_vprint(ANDROID_LOG_ERROR, PACKAGE, fmt, aq);
                                                         ^
log.c:105:50: error: use of undeclared identifier fmt
        __android_log_vprint(ANDROID_LOG_WARN, PACKAGE, fmt, aq);
                                                        ^