ndk-patches: make futimes, lutimes and futimesat visible in sys/time.h

We now have libandroid-utimes which provides these functions, so update header to reflect this.

Normally the android libc only supports these functions for api level
>=26, but we support api level >= 24.

The futimesat function also takes an extra argument compared to bionic
one: int flags, due to that unar expects that type of futimesat
function. We can add another futimesat variant (without flags) when it
is needed.

ndk-patches/26b/sys-time.h.patch

@@ -0,0 +1,26 @@
+--- ./usr/include/sys/time.h.orig	2024-03-21 21:20:39.291006515 +0000
++++ ./usr/include/sys/time.h	2024-03-23 15:15:08.754434710 +0000
+@@ -48,10 +48,8 @@
+ 
+ #if defined(__USE_BSD)
+ 
+-#if __ANDROID_API__ >= 26
+-int futimes(int __fd, const struct timeval __times[_Nullable 2]) __INTRODUCED_IN(26);
+-int lutimes(const char* _Nonnull __path, const struct timeval __times[_Nullable 2]) __INTRODUCED_IN(26);
+-#endif /* __ANDROID_API__ >= 26 */
++int futimes(int __fd, const struct timeval __times[_Nullable 2]);
++int lutimes(const char* _Nonnull __path, const struct timeval __times[_Nullable 2]);
+ 
+ #endif
+ 
+@@ -70,9 +68,7 @@
+  * Available since API level 26.
+  */
+ 
+-#if __ANDROID_API__ >= 26
+-int futimesat(int __dir_fd, const char* __BIONIC_COMPLICATED_NULLNESS __path, const struct timeval __times[_Nullable 2]) __INTRODUCED_IN(26);
+-#endif /* __ANDROID_API__ >= 26 */
++int futimesat(int __dir_fd, const char* __BIONIC_COMPLICATED_NULLNESS __path, const struct timeval __times[_Nullable 2], int flags);
+ 
+ #endif
+ 

scripts/build/termux_step_setup_toolchain.sh

@@ -7,7 +7,7 @@ termux_step_setup_toolchain() {
 		# toolchain setup to ensure that everyone gets an updated
 		# toolchain
 		if [ "${TERMUX_NDK_VERSION}" = "26b" ]; then
-			TERMUX_STANDALONE_TOOLCHAIN+="-v1"
+			TERMUX_STANDALONE_TOOLCHAIN+="-v2"
 			termux_setup_toolchain_26b
 		elif [ "${TERMUX_NDK_VERSION}" = 23c ]; then
 			TERMUX_STANDALONE_TOOLCHAIN+="-v6"