lang/spidermonkey78: update to 78.6.0 [1]

While here, allow building with system clang 10 on 12.2 [2]

PR:		251895 [1]
PR:		251480 [2]
Submitted by:	mikael, janm@transactionware.com [2]
Exp-run by:	antoine [1]
Reported by:	janm@transactionware.com [2]

1 files changed, 32 insertions, 0 deletions

diff --git a/lang/spidermonkey78/files/patch-third__party_rust_cc_src_lib.rs b/lang/spidermonkey78/files/patch-third__party_rust_cc_src_lib.rs
new file mode 100644
index 000000000000..9c04ba1845c4
--- /dev/null
+++ b/lang/spidermonkey78/files/patch-third__party_rust_cc_src_lib.rs
@@ -0,0 +1,32 @@
+--- third_party/rust/cc/src/lib.rs.orig	2020-10-14 09:34:53 UTC
++++ third_party/rust/cc/src/lib.rs
+@@ -2344,28 +2344,7 @@ impl Tool {
+     }
+ 
+     fn with_features(path: PathBuf, clang_driver: Option<&str>, cuda: bool) -> Self {
+-        // Try to detect family of the tool from its name, falling back to Gnu.
+-        let family = if let Some(fname) = path.file_name().and_then(|p| p.to_str()) {
+-            if fname.contains("clang-cl") {
+-                ToolFamily::Msvc { clang_cl: true }
+-            } else if fname.contains("cl")
+-                && !fname.contains("cloudabi")
+-                && !fname.contains("uclibc")
+-                && !fname.contains("clang")
+-            {
+-                ToolFamily::Msvc { clang_cl: false }
+-            } else if fname.contains("clang") {
+-                match clang_driver {
+-                    Some("cl") => ToolFamily::Msvc { clang_cl: true },
+-                    _ => ToolFamily::Clang,
+-                }
+-            } else {
+-                ToolFamily::Gnu
+-            }
+-        } else {
+-            ToolFamily::Gnu
+-        };
+-
++        let family = ToolFamily::Gnu;
+         Tool {
+             path: path,
+             cc_wrapper_path: None,