Crash in logging (Debug and Error levels)

[julianrex]

Variable arguments are not being passed to debugLog and errorLog here:

mapbox-gl-native-ios/platform/darwin/src/MGLNetworkConfiguration.m

Lines 130 to 136 in 709ea4c

	- (void)debugLog:(NSString *)format, ... {
	MGLLogDebug(format);
	}
	- (void)errorLog:(NSString *)format, ... {
	MGLLogError(format);
	}

This will result in a crash if the logging level is set to include debug or errors.

We need to add a method to MGLLoggingConfiguration, along the lines of:

- (void)logCallingFunction:(const char *)callingFunction functionLine:(NSUInteger)functionLine messageType:(MGLLoggingLevel)type format:(id)messageFormat arguments:(va_list)argList;

(and associated calling macros).

Configuration

Mapbox SDK versions: 6.1.0-beta.1 (though was introduced in #228)