Build separate speex library for iOS Simulator

The iOS simulator and device targets were both linking against the same
libspeex.a (built for iphoneos, platform=2). Xcode 24's linker treats
platform mismatches as errors, breaking simulator builds.

- Build script now builds for iphoneos, iphonesimulator, and macOS
  separately using explicit -sdk flags
- Gradle config points iosArm64 at lib/ios/ and iosX64/iosSimulatorArm64
  at lib/ios-simulator/
- Prebuilt .a files included for all three platforms

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 2 people

library/build.gradle.kts

@@ -56,16 +56,27 @@ kotlin {
             }
         }
     }
+    iosArm64 {
+        val root = project.rootDir
+        compilations.getByName("main") {
+            cinterops {
+                val speex by creating {
+                    extraOpts("-libraryPath", "${root}/speex/lib/ios")
+                    compilerOpts.add("-I${root}/speex/include")
+                    compilerOpts.add("-I${root}/speex/source/include")
+                }
+            }
+        }
+    }
     listOf(
         iosX64(),
-        iosArm64(),
         iosSimulatorArm64()
     ).forEach {
         val root = project.rootDir
         it.compilations.getByName("main") {
             cinterops {
                 val speex by creating {
-                    extraOpts("-libraryPath", "${root}/speex/lib/ios")
+                    extraOpts("-libraryPath", "${root}/speex/lib/ios-simulator")
                     compilerOpts.add("-I${root}/speex/include")
                     compilerOpts.add("-I${root}/speex/source/include")
                 }

speex/build-ios.sh

@@ -1,6 +1,19 @@
 #!/usr/bin/env sh
-xcodebuild -alltargets
+set -e
+
+# Build iOS device
+xcodebuild -target speex -sdk iphoneos -configuration Release
+
+# Build iOS simulator
+xcodebuild -target speex -sdk iphonesimulator -configuration Release
+
+# Build macOS
+xcodebuild -target speex-macos -configuration Release
+
 mkdir -p lib/ios
+mkdir -p lib/ios-simulator
 mkdir -p lib/macos
-mv build/Release-iphoneos/libspeex.a lib/ios/libspeex.a
-mv build/Release/libspeex-macos.a lib/macos/libspeex.a
+
+cp build/Release-iphoneos/libspeex.a lib/ios/libspeex.a
+cp build/Release-iphonesimulator/libspeex.a lib/ios-simulator/libspeex.a
+cp build/Release/libspeex-macos.a lib/macos/libspeex.a