Update from NDK version used from r15b to r15c

The docker image has been updated - run scripts/update-docker.sh

build-package.sh

@@ -255,7 +255,7 @@ termux_step_setup_variables() {
 	: "${TERMUX_DEBUG:=""}"
 	: "${TERMUX_PKG_API_LEVEL:="21"}"
 	: "${TERMUX_ANDROID_BUILD_TOOLS_VERSION:="25.0.3"}"
-	: "${TERMUX_NDK_VERSION:="15.1"}"
+	: "${TERMUX_NDK_VERSION:="15.2"}"
 
 	if [ "x86_64" = "$TERMUX_ARCH" ] || [ "aarch64" = "$TERMUX_ARCH" ]; then
 		TERMUX_ARCH_BITS=64

ndk-patches/sys-cdefs.h.patch

@@ -1,19 +1,16 @@
 diff -u -r /home/fornwall/lib/android-ndk/sysroot/usr/include/sys/cdefs.h ./usr/include/sys/cdefs.h
---- /home/fornwall/lib/android-ndk/sysroot/usr/include/sys/cdefs.h	2017-06-20 17:41:56.000000000 +0200
-+++ ./usr/include/sys/cdefs.h	2017-07-09 23:37:26.453911992 +0200
-@@ -237,9 +237,15 @@
+--- /home/fornwall/lib/android-ndk/sysroot/usr/include/sys/cdefs.h	2017-07-21 11:04:10.000000000 +0200
++++ ./usr/include/sys/cdefs.h	2017-08-07 22:50:14.093361547 +0200
+@@ -235,7 +235,11 @@
+ #endif
+ 
  /* _FILE_OFFSET_BITS 64 support. */
- #if !defined(__LP64__) && defined(_FILE_OFFSET_BITS)
- #if _FILE_OFFSET_BITS == 64
-+#ifdef TERMUX_EXPOSE_FILE_OFFSET64
-+/* Using _FILE_OFFSET_BITS=64 does not work very well on Android
+-#if !defined(__LP64__) && defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64
++/* Using _FILE_OFFSET_BITS=64 does not work well on Android
 + * and can cause problems when mixing libraries, which is why
 + * Termux hides away this unless TERMUX_EXPOSE_FILE_OFFSET64
 + * is defined. */
++#if !defined(__LP64__) && defined(_FILE_OFFSET_BITS) && _FILE_OFFSET_BITS == 64 && defined(TERMUX_EXPOSE_FILE_OFFSET64)
  #define __USE_FILE_OFFSET64 1
- #endif
- #endif
-+#endif
- 
- #define  __BIONIC__   1
- #include <android/api-level.h>
+ #define __RENAME_IF_FILE_OFFSET64(func) __RENAME(func)
+ #else

scripts/setup-android-sdk.sh

@@ -25,7 +25,7 @@ if [ ! -d $NDK ]; then
 	mkdir -p $NDK
 	cd $NDK/..
 	rm -Rf `basename $NDK`
-	NDK_VERSION=r15b
+	NDK_VERSION=r15c
 	curl --fail --retry 3 -o ndk.zip \
 		http://dl.google.com/android/repository/android-ndk-${NDK_VERSION}-`uname`-x86_64.zip