[tectonic] 0.15.0 (#9232)

* [tectonic] 0.15.0

* Disable musl

T/tectonic/build_tarballs.jl

@@ -3,12 +3,12 @@
 using BinaryBuilder, Pkg
 
 name = "tectonic"
-version = v"0.14.1"
+version = v"0.15.0"
 
 # Collection of sources required to build tar
 sources = [
     GitSource("https://github.com/tectonic-typesetting/tectonic.git",
-              "e9b786655cac895bb148c5bfa3fc4cec6a01d72f"),
+              "33ae8e755413c6b0d7adcbb550818683c6be645c"),
 ]
 
 # Bash recipe for building across all platforms
@@ -29,6 +29,8 @@ platforms = supported_platforms()
 filter!(p -> arch(p) != "armv6l", platforms)
 # Rust toolchain for i686 Windows is unusable
 filter!(p -> !Sys.iswindows(p) || arch(p) != "i686", platforms)
+# Musl used to build in 0.14 but does not in 0.15.
+filter!(p -> libc(p) != "musl", platforms)
 platforms = expand_cxxstring_abis(platforms)
 
 # The products that we will ensure are always built