Run core tests in Safari. Partially addresses https://github.com/pyodide/pyodide/issues/989

It runs, but there are several test failures, I'll open separate issues about those.
package:
  name: libiconv
  version: "1.16"

source:
  url: https://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.16.tar.gz
  sha256: e6a1b1b589654277ee790cce3734f07876ac4ccfaecbee8afa0b649cf529cc04

build:
  library: true
  script: |
    emconfigure ./configure \
       CFLAGS="-fPIC" \
       --disable-dependency-tracking \
       --disable-shared \
       --prefix=${WASM_LIBRARY_DIR}

    emmake make -j ${PYODIDE_JOBS:-3}
    emmake make install

package:
  name: libiconv
  version: "1.16"

source:
  url: https://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.16.tar.gz
  sha256: e6a1b1b589654277ee790cce3734f07876ac4ccfaecbee8afa0b649cf529cc04

build:
  library: true
  script: |
    emconfigure ./configure \
       CFLAGS="-fPIC" \
       --disable-dependency-tracking \
       --disable-shared \
       --prefix=${WASM_LIBRARY_DIR}

    emmake make -j ${PYODIDE_JOBS:-3}
    emmake make install
