chore: simplify entrypoint install script

Author: mayeut

docker/build_scripts/build_utils.sh

@@ -11,7 +11,7 @@ MANYLINUX_CXXFLAGS="-g -O2 -Wall -fdebug-prefix-map=/=. -fstack-protector-strong
 MANYLINUX_LDFLAGS="-Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now"
 
 export BASE_POLICY=manylinux
-if [ "${AUDITWHEEL_POLICY:0:9}" == "musllinux" ]; then
+if [ "${AUDITWHEEL_POLICY:0:10}" == "musllinux_" ]; then
 	export BASE_POLICY=musllinux
 fi
 

docker/build_scripts/install-entrypoint.sh

@@ -23,6 +23,6 @@ if [ "${AUDITWHEEL_PLAT}" = "manylinux2014_i686" ]; then
 	LC_ALL=C "${MY_DIR}/update-system-packages.sh"
 fi
 
-if [ "${AUDITWHEEL_POLICY}" = "musllinux_1_1" ] || [ "${AUDITWHEEL_POLICY}" = "musllinux_1_2" ]; then
+if [ "${AUDITWHEEL_POLICY:0:10}" == "musllinux_" ]; then
 	apk add --no-cache bash
 fi