Added header only sparsehash library that I needed for my project (#4302)

* Added header only sparsehash library that I needed for my project

* I believe this works

* Update G/GoogleSparseHash/build_tarballs.jl

Co-authored-by: Mosè Giordano <[email protected]>

* Update G/GoogleSparseHash/build_tarballs.jl

Co-authored-by: Mosè Giordano <[email protected]>

* Update G/GoogleSparseHash/build_tarballs.jl

Co-authored-by: Mosè Giordano <[email protected]>

* Update G/GoogleSparseHash/build_tarballs.jl

Co-authored-by: Mosè Giordano <[email protected]>

Co-authored-by: Maeve Andersen <[email protected]>
Co-authored-by: Mosè Giordano <[email protected]>

Author: 3 people

G/GoogleSparseHash/build_tarballs.jl

@@ -0,0 +1,44 @@
+# Note that this script can accept some limited command-line arguments, run
+# `julia build_tarballs.jl --help` to see a usage message.
+using BinaryBuilder, Pkg
+
+name = "GoogleSparseHash"
+version = v"2.11.1"
+
+# Collection of sources required to complete build
+sources = [
+    GitSource("https://github.com/sparsehash/sparsehash-c11.git", "edd6f1180156e76facc1c0449da245208ab39503")
+]
+
+
+script = raw"""
+cd sparsehash-*
+install_license LICENSE
+
+mkdir ${prefix}/include
+mv sparsehash ${prefix}/include/
+"""
+
+# These are the platforms we will build for by default, unless further
+# platforms are passed in on the command line
+platforms = [AnyPlatform()]
+
+products = [
+    FileProduct("include/sparsehash/dense_hash_map", :dense_hash_map),
+    FileProduct("include/sparsehash/dense_hash_set", :dense_hash_set),
+    FileProduct("include/sparsehash/sparse_hash_map", :sparse_hash_map),
+    FileProduct("include/sparsehash/sparse_hash_set", :sparse_hash_set),
+    FileProduct("include/sparsehash/sparsetable", :sparsetable),
+    FileProduct("include/sparsehash/traits", :traits),
+    FileProduct("include/sparsehash/internal/densehashtable.h", :densehashtable_h),
+    FileProduct("include/sparsehash/internal/hashtable-common.h", :hashtable_common_h),
+    FileProduct("include/sparsehash/internal/libc_allocator_with_realloc.h", :libc_allocator_with_realloc_h),
+    FileProduct("include/sparsehash/internal/sparsehashtable.h", :sparsehashtable_h)
+]
+
+# Dependencies that must be installed before this package can be built
+dependencies = Dependency[
+]
+
+# Build the tarballs, and possibly a `build.jl` as well.
+build_tarballs(ARGS, name, version, sources, script, platforms, products, dependencies; julia_compat="1.6", preferred_gcc_version = v"6.1.0")