Updates j2objcc to compile .mm files without specifying a language (-x) or language standard (-std=).
Updates j2objcc to compile .mm files without specifying a language (-x) or language standard (-std=).

PiperOrigin-RevId: 359640097

groschovskiy/j2objc,mirego/j2objc,groschovskiy/j2objc,groschovskiy/j2objc,google/j2objc,mirego/j2objc,google/j2objc,mirego/j2objc,mirego/j2objc,google/j2objc,mirego/j2objc,groschovskiy/j2objc,google/j2objc,google/j2objc,google/j2objc,groschovskiy/j2objc,mirego/j2objc,groschovskiy/j2objc