Rename environment variable to avoid conflicts with other packages

Author: cmcgee1024

Package.swift

@@ -1022,7 +1022,9 @@ if ProcessInfo.processInfo.environment["SWIFTCI_USE_LOCAL_DEPS"] == nil {
     ]
 }
 
-if ProcessInfo.processInfo.environment["SWIFTPM_SWBUILD_FRAMEWORK"] == nil {
+if ProcessInfo.processInfo.environment["SWIFTPM_SWBUILD_FRAMEWORK"] == nil &&
+    ProcessInfo.processInfo.environment["SWIFTPM_NO_SWBUILD_DEPENDENCY"] == nil {
+
     let swiftbuildsupport: Target = package.targets.first(where: { $0.name == "SwiftBuildSupport" } )!
     swiftbuildsupport.dependencies += [
         .product(name: "SwiftBuild", package: "swift-build"),

Utilities/bootstrap

@@ -782,7 +782,7 @@ def get_swiftpm_env_cmd(args):
 
     if args.llbuild_link_framework:
         env_cmd.append("SWIFTPM_LLBUILD_FWK=1")
-    env_cmd.append("SWIFTPM_SWBUILD_FRAMEWORK=1")
+    env_cmd.append("SWIFTPM_NO_SWBUILD_DEPENDENCY=1")
     env_cmd.append("SWIFTCI_USE_LOCAL_DEPS=1")
     env_cmd.append("SWIFTPM_MACOS_DEPLOYMENT_TARGET=%s" % g_macos_deployment_target)