Don't use lpthread for Android

Thanks to Peter Osterlund for the feedback.

No functional change.

Author: mcostalba

src/Makefile

@@ -263,9 +263,12 @@ endif
 
 ### On mingw use Windows threads, otherwise POSIX
 ifneq ($(comp),mingw)
-	# Haiku has pthreads in its libroot, so only link it in on other platforms
-	ifneq ($(UNAME),Haiku)
-		LDFLAGS += -lpthread
+	# On Android Bionic's C library comes with its own pthread implementation bundled in
+	ifneq ($(arch),armv7)
+		# Haiku has pthreads in its libroot, so only link it in on other platforms
+		ifneq ($(UNAME),Haiku)
+			LDFLAGS += -lpthread
+		endif
 	endif
 endif