build: Use Homebrew's sqlite package if it is available

configure.ac

@@ -642,13 +642,17 @@ case $host in
          dnl It's safe to add these paths even if the functionality is disabled by
          dnl the user (--without-wallet or --without-gui for example).
 
-         if $BREW list --versions berkeley-db4 >/dev/null && test "x$BDB_CFLAGS" = "x" && test "x$BDB_LIBS" = "x" && test "$use_bdb" != "no"; then
+         if test "x$use_bdb" != xno && $BREW list --versions berkeley-db4 >/dev/null && test "x$BDB_CFLAGS" = "x" && test "x$BDB_LIBS" = "x"; then
            bdb_prefix=$($BREW --prefix berkeley-db4 2>/dev/null)
            dnl This must precede the call to BITCOIN_FIND_BDB48 below.
            BDB_CFLAGS="-I$bdb_prefix/include"
            BDB_LIBS="-L$bdb_prefix/lib -ldb_cxx-4.8"
          fi
 
+         if test "x$use_sqlite" != xno && $BREW list --versions sqlite3 >/dev/null; then
+           export PKG_CONFIG_PATH="$($BREW --prefix sqlite3 2>/dev/null)/lib/pkgconfig:$PKG_CONFIG_PATH"
+         fi
+
          if $BREW list --versions qt5 >/dev/null; then
            export PKG_CONFIG_PATH="$($BREW --prefix qt5 2>/dev/null)/lib/pkgconfig:$PKG_CONFIG_PATH"
          fi