Use "meson setup"

This fixes the following warning:

> WARNING: Running the setup command as `meson [options]` instead of
> `meson setup [options]` is ambiguous and deprecated.

BUILD.md

@@ -260,7 +260,7 @@ set ANDROID_SDK_ROOT=%LOCALAPPDATA%\Android\sdk
 Then, build:
 
 ```bash
-meson x --buildtype=release --strip -Db_lto=true
+meson setup x --buildtype=release --strip -Db_lto=true
 ninja -Cx  # DO NOT RUN AS ROOT
 ```
 
@@ -281,7 +281,7 @@ Download the prebuilt server somewhere, and specify its path during the Meson
 configuration:
 
 ```bash
-meson x --buildtype=release --strip -Db_lto=true \
+meson setup x --buildtype=release --strip -Db_lto=true \
     -Dprebuilt_server=/path/to/scrcpy-server
 ninja -Cx  # DO NOT RUN AS ROOT
 ```

DEVELOP.md

@@ -277,7 +277,7 @@ The server is pushed to the device by the client on startup.
 To debug it, enable the server debugger during configuration:
 
 ```bash
-meson x -Dserver_debugger=true
+meson setup x -Dserver_debugger=true
 # or, if x is already configured
 meson configure x -Dserver_debugger=true
 ```
@@ -286,7 +286,7 @@ If your device runs Android 8 or below, set the `server_debugger_method` to
 `old` in addition:
 
 ```bash
-meson x -Dserver_debugger=true -Dserver_debugger_method=old
+meson setup x -Dserver_debugger=true -Dserver_debugger_method=old
 # or, if x is already configured
 meson configure x -Dserver_debugger=true -Dserver_debugger_method=old
 ```

release.mk

@@ -53,13 +53,13 @@ clean:
 
 test:
 	[ -d "$(TEST_BUILD_DIR)" ] || ( mkdir "$(TEST_BUILD_DIR)" && \
-		meson "$(TEST_BUILD_DIR)" -Db_sanitize=address )
+		meson setup "$(TEST_BUILD_DIR)" -Db_sanitize=address )
 	ninja -C "$(TEST_BUILD_DIR)"
 	$(GRADLE) -p server check
 
 build-server:
 	[ -d "$(SERVER_BUILD_DIR)" ] || ( mkdir "$(SERVER_BUILD_DIR)" && \
-		meson "$(SERVER_BUILD_DIR)" --buildtype release -Dcompile_app=false )
+		meson setup "$(SERVER_BUILD_DIR)" --buildtype release -Dcompile_app=false )
 	ninja -C "$(SERVER_BUILD_DIR)"
 
 prepare-deps-win32:
@@ -76,7 +76,7 @@ prepare-deps-win64:
 
 build-win32: prepare-deps-win32
 	[ -d "$(WIN32_BUILD_DIR)" ] || ( mkdir "$(WIN32_BUILD_DIR)" && \
-		meson "$(WIN32_BUILD_DIR)" \
+		meson setup "$(WIN32_BUILD_DIR)" \
 			--cross-file cross_win32.txt \
 			--buildtype release --strip -Db_lto=true \
 			-Dcompile_server=false \
@@ -85,7 +85,7 @@ build-win32: prepare-deps-win32
 
 build-win64: prepare-deps-win64
 	[ -d "$(WIN64_BUILD_DIR)" ] || ( mkdir "$(WIN64_BUILD_DIR)" && \
-		meson "$(WIN64_BUILD_DIR)" \
+		meson setup "$(WIN64_BUILD_DIR)" \
 			--cross-file cross_win64.txt \
 			--buildtype release --strip -Db_lto=true \
 			-Dcompile_server=false \