Merge bitcoin#29237: depends: Allow PATH with spaces in directory names.

4756114 [depends] Allow PATH with spaces in directory names. (Mark Friedenbach)

Pull request description:

  The goal of this PR is to help close bitcoin#28733. I reverted the change on `depends/config.guess` based on the feedback provided in the previous PR. I've also incorporated the test mentioned by maflcko

ACKs for top commit:
  maflcko:
    lgtm ACK 4756114
  hebasto:
    ACK 4756114, successfully built depends on Ubuntu 22.04.
  TheCharlatan:
    ACK 4756114

Tree-SHA512: ee257f6efd235839156bc236384f08d77b91debc3c257168368a71e70742639f28a3289572b8693609c1109062dc9968e461103d1f4f5679906506e94b54e649

ci/test/02_run_container.sh

@@ -70,7 +70,7 @@ if [ "$CI_OS_NAME" == "macos" ]; then
 fi
 
 CI_EXEC () {
-  $CI_EXEC_CMD_PREFIX bash -c "export PATH=${BINS_SCRATCH_DIR}:${BASE_ROOT_DIR}/ci/retry:\$PATH && cd \"${BASE_ROOT_DIR}\" && $*"
+  $CI_EXEC_CMD_PREFIX bash -c "export PATH=\"/path_with space:${BINS_SCRATCH_DIR}:${BASE_ROOT_DIR}/ci/retry:\$PATH\" && cd \"${BASE_ROOT_DIR}\" && $*"
 }
 export -f CI_EXEC
 

depends/funcs.mk

@@ -139,9 +139,9 @@ $(1)_config_env+=PKG_CONFIG_LIBDIR=$($($(1)_type)_prefix)/lib/pkgconfig
 $(1)_config_env+=PKG_CONFIG_PATH=$($($(1)_type)_prefix)/share/pkgconfig
 $(1)_config_env+=PKG_CONFIG_SYSROOT_DIR=/
 $(1)_config_env+=CMAKE_MODULE_PATH=$($($(1)_type)_prefix)/lib/cmake
-$(1)_config_env+=PATH=$(build_prefix)/bin:$(PATH)
-$(1)_build_env+=PATH=$(build_prefix)/bin:$(PATH)
-$(1)_stage_env+=PATH=$(build_prefix)/bin:$(PATH)
+$(1)_config_env+=PATH="$(build_prefix)/bin:$(PATH)"
+$(1)_build_env+=PATH="$(build_prefix)/bin:$(PATH)"
+$(1)_stage_env+=PATH="$(build_prefix)/bin:$(PATH)"
 
 # Setting a --build type that differs from --host will explicitly enable
 # cross-compilation mode. Note that --build defaults to the output of