Add Support for NDK r20 (moritz-wundke#172)

README.md

@@ -27,6 +27,7 @@ To compile Boost for Android you may use one of the following NDKs:
 | r18b from the [official android repository](http://developer.android.com).                |   |   |   |   |   |   |   | x | x | x |
 | r19 from the [official android repository](http://developer.android.com).                 |   |   |   |   |   |   |   |   | x |   |
 | r19c from the [official android repository](http://developer.android.com).                |   |   |   |   |   |   |   |   | x | x |
+| r20 from the [official android repository](http://developer.android.com).                |   |   |   |   |   |   |   |   |   | x |
 
 For NDK from r4 to r10, GCC with gnustl_static runtime library is used, only ARM architecture is supported.
 

build-android.sh

@@ -315,7 +315,7 @@ case "$NDK_RN" in
 		CXXPATH=$AndroidNDKRoot/toolchains/${TOOLCHAIN}/prebuilt/${PlatformOS}-x86_64/bin/clang++
 		TOOLSET=clang
 		;;
-	"19.0"|"19.1"|"19.2")
+	"19.0"|"19.1"|"19.2"|"20.0")
 		TOOLCHAIN=${TOOLCHAIN:-llvm}
 		CXXPATH=$AndroidNDKRoot/toolchains/${TOOLCHAIN}/prebuilt/${PlatformOS}-x86_64/bin/clang++
 		TOOLSET=clang
@@ -336,7 +336,7 @@ if [ -z "${ARCHLIST}" ]; then
 
     case "$NDK_RN" in
       # NDK 17+: Support for ARMv5 (armeabi), MIPS, and MIPS64 has been removed.
-      "17.1"|"17.2"|"18.0"|"18.1"|"19.0"|"19.1"|"19.2")
+      "17.1"|"17.2"|"18.0"|"18.1"|"19.0"|"19.1"|"19.2"|"20.0")
         ARCHLIST="arm64-v8a armeabi-v7a x86 x86_64"
         ;;
       *)