[libpopcnt] add new port (#48150)

ports/libpopcnt/portfile.cmake

@@ -0,0 +1,13 @@
+set(VCPKG_BUILD_TYPE release) # Header-only library
+
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO kimwalisch/libpopcnt
+    REF "v${VERSION}"
+    SHA512 b01f1446c951b848357ed01e31cb2d1014639ba854710edcc5703b69226b9ca2e65c84d78308cf345654fbfc92ce467bb5a5171158db5b94f979674efb59f6dc
+    HEAD_REF master
+)
+
+file(COPY "${SOURCE_PATH}/libpopcnt.h" DESTINATION "${CURRENT_PACKAGES_DIR}/include")
+
+vcpkg_install_copyright(FILE_LIST "${SOURCE_PATH}/LICENSE")

ports/libpopcnt/vcpkg.json

@@ -0,0 +1,7 @@
+{
+  "name": "libpopcnt",
+  "version": "3.1",
+  "description": "Fast C/C++ bit population count library",
+  "homepage": "https://github.com/kimwalisch/libpopcnt",
+  "license": "BSD-2-Clause"
+}

versions/baseline.json

@@ -5332,6 +5332,10 @@
       "baseline": "1.6.50",
       "port-version": 0
     },
+    "libpopcnt": {
+      "baseline": "3.1",
+      "port-version": 0
+    },
     "libpopt": {
       "baseline": "1.16",
       "port-version": 18

versions/l-/libpopcnt.json

@@ -0,0 +1,9 @@
+{
+  "versions": [
+    {
+      "git-tree": "75540d799c09ac684dcd0e1503129e471621e626",
+      "version": "3.1",
+      "port-version": 0
+    }
+  ]
+}