Unpin the `cc` crate version

ci/docker/aarch64-linux-android/Dockerfile

@@ -30,6 +30,7 @@ RUN chmod 755 /android/sdk/cmdline-tools/tools/* /android/sdk/emulator/qemu/linu
 ENV PATH=$PATH:/rust/bin \
     CARGO_TARGET_AARCH64_LINUX_ANDROID_LINKER=aarch64-linux-android28-clang \
     CARGO_TARGET_AARCH64_LINUX_ANDROID_RUNNER=/tmp/runtest \
+    CC_aarch64_linux_android=aarch64-linux-android28-clang \
     HOME=/tmp
 
 ADD runtest-android.rs /tmp/runtest.rs

ci/docker/arm-linux-androideabi/Dockerfile

@@ -30,6 +30,7 @@ RUN chmod 755 /android/sdk/cmdline-tools/tools/* /android/sdk/emulator/qemu/linu
 ENV PATH=$PATH:/rust/bin \
     CARGO_TARGET_ARM_LINUX_ANDROIDEABI_LINKER=arm-linux-androideabi-gcc \
     CARGO_TARGET_ARM_LINUX_ANDROIDEABI_RUNNER=/tmp/runtest \
+    CC_arm_linux_androideabi=arm-linux-androideabi-gcc \
     HOME=/tmp
 
 ADD runtest-android.rs /tmp/runtest.rs

ci/docker/i686-linux-android/Dockerfile

@@ -30,6 +30,7 @@ RUN chmod 755 /android/sdk/cmdline-tools/tools/* /android/sdk/emulator/qemu/linu
 ENV PATH=$PATH:/rust/bin \
     CARGO_TARGET_I686_LINUX_ANDROID_LINKER=i686-linux-android-gcc \
     CARGO_TARGET_I686_LINUX_ANDROID_RUNNER=/tmp/runtest \
+    CC_i686_linux_android=i686-linux-android-gcc \
     HOME=/tmp
 
 ADD runtest-android.rs /tmp/runtest.rs

libc-test/Cargo.toml

@@ -9,7 +9,7 @@ path = ".."
 default-features = false
 
 [build-dependencies]
-cc = "=1.0.52"
+cc = "1.0.61"
 # FIXME: Use fork ctest until the maintainer gets back.
 ctest2 = "0.3"