[fmt] Update to 7.0.3

[kevinlul]

Regular port update, no new features

https://github.com/fmtlib/fmt/releases/tag/7.0.3

[stevemk14ebr]

Hi, this seems to have a build failure:

.\vcpkg install fmt
Computing installation plan...
The following packages will be built and installed:
    fmt[core]:x86-windows
Detecting compiler hash for triplet x86-windows...
Starting package 1/1: fmt:x86-windows
Building package fmt[core]:x86-windows...
Could not locate cached archive: C:\Users\Stephen Eckels\AppData\Local\vcpkg/archives\e5\e5939e632201c3ffe1781c02b77cc51f774b9175.zip
-- Cleaning sources at C:/Users/Stephen Eckels/source/repos/vcpkg/buildtrees/fmt/src/8668ca3d05-7f40cec0ee.clean. Use --editable to skip cleaning for the packages you specify.
-- Applying patch fix-warning4189.patch
-- Building x86-windows-dbg
-- Building x86-windows-rel
-- Installing: C:/Users/Stephen Eckels/source/repos/vcpkg/packages/fmt_x86-windows/share/fmt/copyright
-- Fixing pkgconfig file: C:/Users/Stephen Eckels/source/repos/vcpkg/packages/fmt_x86-windows/lib/pkgconfig/fmt.pc
-- CHECK_LIB_fmt_RELEASE:CHECK_LIB_fmt_RELEASE-NOTFOUND
CMake Error at scripts/cmake/vcpkg_fixup_pkgconfig.cmake:232 (message):
  Library "fmt" was not found! If it is a system library use the
  SYSTEM_LIBRARIES parameter for the vcpkg_fixup_pkgconfig call! Otherwise,
  correct the *.pc file
Call Stack (most recent call first):
  scripts/cmake/vcpkg_fixup_pkgconfig.cmake:298 (vcpkg_fixup_pkgconfig_check_files)
  ports/fmt/portfile.cmake:44 (vcpkg_fixup_pkgconfig)
  scripts/ports.cmake:79 (include)


Error: Building package fmt:x86-windows failed with: BUILD_FAILED
Please ensure you're using the latest portfiles with `.\vcpkg update`, then
submit an issue at https://github.com/Microsoft/vcpkg/issues including:
  Package: fmt:x86-windows
  Vcpkg version: 2020.06.15-nohash

Additionally, attach any relevant sections from the log files above.

[stevemk14ebr]

Actually, it seems there's a bug when the path to vcpkg has a space. My user profile name has a space in it which breaks this package install. Moving to a non-spaced directory fixes the issue.